Grade Level: 1-4
Web Site Title: Circle 21
URL: http://nlvm.usu.edu/en/nav/frames_asid_188_g_2_t_1.html?open=instructions
Description: Challenging! The goal of this puzzle is to put three numbers inside of each circle so that they add up to 21. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to 21, the circle changes color.
Contributor: bweitzman
Website Site Title: Elementary Websites
URL: http://edweb.tusd.k12.az.us/ekowalcz/math/elementary_web_sites.htm
Description:Websites on number sense and operations
Contributor: Tatiana Rebelo
Grade Level: Grade 2
Web Site Title: Jan Brett
URL: http://www.janbrett.com/piggybacks/rounding.htm
Description: Rounding numbers
Contributor: Tatiana Rebelo
Grade Level: Grade 1
Web Site Title: Internet 4 classrooms
URL: http://www.internet4classrooms.com/skills_1st.htm
Description: Interactive sites for 1st Graders
Contributor: Tatiana Rebelo
Grade Level: 3 & 4
Web Site Title: linkslearning
URL: http://www.linkslearning.org/Kids/1_Math/2_Illustrated_Lessons/3_Place_Value/index.html
Description: a clear review of a place value lesson to return to whenever the student gets stuck or confused
Contributor: Patricia Carella
Grade Level: 1-4
Web Site Title: Circle 21
URL: http://nlvm.usu.edu/en/nav/frames_asid_188_g_2_t_1.html?open=instructions
Description: Challenging! The goal of this puzzle is to put three numbers inside of each circle so that they add up to 21. Solve the puzzle by dragging the black numbers to the blank spaces. You cannot move the blue numbers. When the three numbers inside any circle add up to 21, the circle changes color.
Contributor: bweitzman
Grade Level: 3-5
Web Site Title: Krypto
URL: http://illuminations.nctm.org/ActivityDetail.aspx?ID=173
Description:Game which uses 5 cards and arithmetic operations to create a target number.
Contributor: llockard
Grade Level:
Web Site Title:
URL: http://www.slideshare.net/simonesu/amazing-math-trick/
Description:
Contributor: